Cable length guidelines for recommended wire size
Table 4: Cable length guidelines and recommended wire sizes for low-voltage (<30 V) Inputs
and Outputs
Guide-
line
Wire size/Gauge and Type
Maximum cable
length and type
Assumptions
1.0 mm (18 AWG) stranded
copper
457 m (1,500 ft)
twisted wire
0.8 mm (20 AWG) stranded
copper
297 m (975 ft)
twisted wire
0.6 mm (22 AWG) stranded
copper
183 m (600 ft)
twisted wire
A
0.5 mm (24 AWG) stranded
copper
107 m (350 ft)
twisted wire
100 mV maximum voltage drop
Depending on cable and the
connected input or output device,
you may have to define an offset
in the setup software for the input
or output point.
1.0 mm (18 AWG) stranded
copper
229 m (750 ft)
twisted wire
0.8 mm (20 AWG) stranded
copper
137 m (450 ft)
twisted wire
0.6 mm (22 AWG) stranded
copper
91 m (300 ft)
twisted wire
B
0.5 mm (24 AWG) stranded
copper
61 m (200 ft)
twisted wire
100 mV maximum voltage drop
Depending on cable and the
connected input or output device,
you may have to define an offset
in the setup software for the input
or output point.
C
See Figure 9 to select wire
size/gauge. Use stranded
copper wire
See Figure 9 to
determine cable
length. Use twisted
wire cable.
N/A
Note:
The required wire sizes and lengths for high-voltage (> 30 V) Relay Outputs are
determined by the load connected to the relay and local, national, or regional electrical codes.
Maximum cable length versus load current
Use Figure 9 to estimate the maximum cable length relative to the wire size and the load current (in
mA) when wiring inputs and outputs.
Figure 9 applies to low-voltage (<30 V) inputs and outputs only. The required wire size
and length for high-voltage (>30 V) Relay Outputs is determined by the load connected to the
relay and local electrical codes.
19
FX-PCX17 and FX-PCX27 Expansion Input/Output Module Installation Instructions
